python3Packages.busylight-for-humans: add optional dependencies of busyserve

Before:

    $ nix-shell --packages 'python3Packages.busylight-for-humans' --run 'busyserve'
    The package `uvicorn` is missing, unable to serve the busylight API.

After:

    $ nix-shell --packages 'python3Packages.busylight-for-humans.overridePythonAttrs (p: { dependencies = p.dependencies ++ p.optional-dependencies.webapi; })' --run 'busyserve'
    INFO:     Started server process [47202]
    INFO:     Waiting for application startup.
    INFO:     Application startup complete.
    INFO:     Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)

Upstream: https://github.com/JnyJny/busylight/blob/v0.35.2/pyproject.toml#L26

pkgs/development/python-modules/busylight-for-humans/default.nix

@@ -3,6 +3,7 @@
   bitvector-for-humans,
   buildPythonPackage,
   fetchFromGitHub,
+  fastapi,
   hidapi,
   loguru,
   poetry-core,
@@ -11,6 +12,7 @@
   pytestCheckHook,
   pythonOlder,
   typer,
+  uvicorn,
   webcolors,
   udevCheckHook,
 }:
@@ -40,6 +42,13 @@ buildPythonPackage rec {
     webcolors
   ];
 
+  optional-dependencies = {
+    webapi = [
+      fastapi
+      uvicorn
+    ];
+  };
+
   nativeCheckInputs = [
     pytestCheckHook
     pytest-mock